Cabletron Systems SmartSTACK 100 - Manual (Page 96)

A-6
Technical Specifications
A.6 THE 5 - 4 - 3 RULE
Between any two nodes (i.e., PCs or other stations) on the network,
there can be:
• Up to five segments in series
• Up to four repeaters or multi-port hubs
• Up to three populated segments (that is, segments attached to
two or more PCs). The remaining two segments are
unpopulated; these are known as inter-repeater links or IRLs.
This distinction between populated and unpopulated segments
is significant for coax networks only.
A.7 EPIM-100FX SPECIFICATIONS
The ELS100-16TX uses a Ethernet Port Interface Module (EPIM) to
provide front panel cable connections. FEPIMs are user-installable.
See Section 2.2, Installing an EPIM.
The EPIM-100FX shown in Figure A-2 supports Multimode Fiber
Optic cabling. The EPIM-100FX is equipped with an SC style
connector.
Table A-5. Crossover RJ45 Pin Assignments
ELS100-16TX ELS100-16TX
1 (Rx+) 3 (Tx+)
2 (Rx-) 6 (Tx-)
3 (Tx+) 1 (Rx+)
6 (Tx-) 2 (Rx-)
Note: This rule is completely consistent with the IEEE 802.3
specification, and is meant only to summarize the configuration
specification.